James suydam



(Nomad.)-

, J. vSUYDAlVI.

VENT. v

Patented May 10, 1887.

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JAMES SUYDAM, or Sfr. PAUL, MINNESOTA.

VENT.

SPECIFICATION forming part of Letters Patent No. seizes-,4, dated May 1o, 18er.

Application filed January 28, 1887. Serial No. 225,8!16. (No model.)

To @ZZ whom it may concern:

Be it known that I, JAMES SUYDAM, a citizen of the United States, residing at St. Paul,

to open as the airis l, into the bottle,

. nesota,

in the county'of Ramsey and State of Minhave invented certain new and useful Improvements in enteffer Liquid-Holding Vessels, tion.

' This invention relates, primarily, to feeding- .bottles used in nursing infants and invalids,

but may be applied to any form of air-tight vessels from which liquids are to be drawn.

The invention consists in an improved construction of removable vent or valve, of rubber or other iexible material, adapted to be inserted into an aperture in the lower part of the liquid-holding vessel, and so constructed as to permit the passage of air into the vessel, while at the same time preventing the escape of the liquid therefrom, whereby the pressure of the air in the vessel is cqualizcd and the formation of a vacuum prevented.

As before stated, the invention may be applied to any form of air-tight liquit'l-holding vessel; but for the purpose of illustration I have shown it applied to an ordinary feedingbottle for infants and invalids, to which it is especially adapted.

In theJ drawings, Figui-e1. is a sectional elcvation of a feedingpottle with one form of my improved vent arranged therein. Fig. 2 is a view of the vent removed. Fig. 3 is a top View, and Fig. 4 is a bottom view, of the vent as shown in Figs. 1, 2, and 3, illustrating more fully its construction.

A represents the bottle, which will be constructed in the ordinary manner and provided with the usual rubber nipple, B, stretched over the mouth A, as shown.

In the center of the bottom A of the bottle, or at any other suitable point, an aperture, D, will be formed, into which the vent is inserted.

The vent is shown constructed of flexible rubber with a tubular portion, C', contracted at its upper part, C2, and with lips b, adapted drawn in, or be closed by the pressure of the liquid when no air is drawn as hereinafter explained. d d2. represent tivo ribs or fianges upon the of which the vfollowing is a speeiticalower part inf the vent, by which the latter will be supp rted in the aperture D, as shown, the rubberx.. t' which the vent is made being suiicientlyl exible to permit the upper rib, d', to be forced through the aperture and the vent to fit therein closely enough to prevent the escape of the liquid between the vent and the bottom A of the bottle. The llexibility of thevent also permits the pressure of the liquid in the bottle to keep the small aperture b closed, so that the presence of the vent will not cause the bottle to leal: at its lower part, while, on the other hand, the iiexibility of the vent also permits the entrance of a small amount of air into and through the liquid in the bottle upon the slightest decrease of the pressure caused by drawing upon the nipple B, thus insuring the equilibrium of the air and preventing the formation of a vacuum in the bottle,whicl1 causes the air vto be drawn into the stomachof the person using the bottle.

In l'ecding-bottles77 as heretofore constructed with simply the nipple I3, from which io draw the liquid, the exhaustion of the liquid causes a vacuum to be formed in the bottle and prevents free flow of the liquid, the air rushing in and being drawn into the stomach of the person using the bottle.

The vent may also be used in barrels and other vessels containing liquids, to supply air to replace that displaced by the removal of the liquids and thus keep up the equilibrium of the pressure to cause the liquid to flow f reel y from the point of discharge.

Having thus described my imf'cntioiuwhat I claim as new is- As a new article of manufacture, a ventfor feeding-bottles and other liquidholding vessels, consisting of a tubular section, C', converging section C, having lips b and ribs d cl2 and adapted to be inserted into the lower part of said feeding-bottle or other vessel, substantiall y as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

' JAMES' SUYDAM.

W`itnesses:

O. N. VG'ODW'ARD, H. S. Wluns'rnn. 

